privdata

package
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 Go to latest Published: Jun 1, 2020 License: Apache-2.0 Imports: 13 Imported by: 0

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Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func BuildCollectionKVSKey 

func BuildCollectionKVSKey(ccname string) string

BuildCollectionKVSKey constructs the collection config key for a given chaincode name

func GetCCNameFromCollectionConfigKey 

func GetCCNameFromCollectionConfigKey(key string) string

GetCCNameFromCollectionConfigKey returns the chaincode name given a collection config key

func IsCollectionConfigKey 

func IsCollectionConfigKey(key string) bool

IsCollectionConfigKey detects if a key is a collection key

func ParseCollectionConfig 

func ParseCollectionConfig(colBytes []byte) (*common.CollectionConfigPackage, error)

ParseCollectionConfig parses the collection configuration from the given serialized representation

func RetrieveCollectionConfigPackageFromState 

func RetrieveCollectionConfigPackageFromState(cc common.CollectionCriteria, state State) (*common.CollectionConfigPackage, error)

RetrieveCollectionConfigPackageFromState retrieves the collection config package from the given key from the given state

Types

type Collection 

type Collection interface {

	// CollectionID returns this collection's ID
	CollectionID() string

	// MemberOrgs returns the collection's members as MSP IDs. This serves as
	// a human-readable way of quickly identifying who is part of a collection.
	MemberOrgs() []string
}

Collection defines a common interface for collections

type CollectionAccessPolicy 

type CollectionAccessPolicy interface {
	// AccessFilter returns a member filter function for a collection
	AccessFilter() Filter

	// The minimum number of peers private data will be sent to upon
	// endorsement. The endorsement would fail if dissemination to at least
	// this number of peers is not achieved.
	RequiredPeerCount() int

	// The maximum number of peers that private data will be sent to
	// upon endorsement. This number has to be bigger than RequiredPeerCount().
	MaximumPeerCount() int

	// MemberOrgs returns the collection's members as MSP IDs. This serves as
	// a human-readable way of quickly identifying who is part of a collection.
	MemberOrgs() []string

	// IsMemberOnlyRead returns a true if only collection members can read
	// the private data
	IsMemberOnlyRead() bool
}

CollectionAccessPolicy encapsulates functions for the access policy of a collection

type CollectionFilter 

type CollectionFilter interface {
	// AccessFilter retrieves the collection's filter that matches a given channel and a collectionPolicyConfig
	AccessFilter(channelName string, collectionPolicyConfig *common.CollectionPolicyConfig) (Filter, error)
}

type CollectionPersistenceConfigs 

type CollectionPersistenceConfigs interface {
	// BlockToLive returns the number of blocks after which the collection data expires.
	// For instance if the value is set to 10, a key last modified by block number 100
	// will be purged at block number 111. A zero value is treated same as MaxUint64
	BlockToLive() uint64
}

CollectionPersistenceConfigs encapsulates configurations related to persistece of a collection

type CollectionStore 

type CollectionStore interface {
	// GetCollection retrieves the collection in the following way:
	// If the TxID exists in the ledger, the collection that is returned has the
	// latest configuration that was committed into the ledger before this txID
	// was committed.
	// Else - it's the latest configuration for the collection.
	RetrieveCollection(common.CollectionCriteria) (Collection, error)

	// GetCollectionAccessPolicy retrieves a collection's access policy
	RetrieveCollectionAccessPolicy(common.CollectionCriteria) (CollectionAccessPolicy, error)

	// RetrieveCollectionConfigPackage retrieves the whole configuration package
	// for the chaincode with the supplied criteria
	RetrieveCollectionConfigPackage(common.CollectionCriteria) (*common.CollectionConfigPackage, error)

	// RetrieveCollectionPersistenceConfigs retrieves the collection's persistence related configurations
	RetrieveCollectionPersistenceConfigs(common.CollectionCriteria) (CollectionPersistenceConfigs, error)

	// HasReadAccess checks whether the creator of the signedProposal has read permission on a
	// given collection
	HasReadAccess(common.CollectionCriteria, *pb.SignedProposal, ledger.QueryExecutor) (bool, error)

	CollectionFilter
}

CollectionStore provides various APIs to retrieves stored collections and perform membership check & read permission check based on the collection's properties. TODO: Refactor CollectionStore - FAB-13082 (1) function such as RetrieveCollection() and RetrieveCollectionConfigPackage() are 

never used except in mocks and test files.

(2) in gossip, at least in 7 different places, the following 3 operations 

are repeated which can be avoided by introducing a API called IsAMemberOf().
    (i)   retrieves collection access policy by calling RetrieveCollectionAccessPolicy()
    (ii)  get the access filter func from the collection access policy
    (iii) create the evaluation policy and check for membership

(3) we would need a cache in collection store to avoid repeated crypto operation. 

This would be simple to implement when we introduce IsAMemberOf() APIs.

func NewSimpleCollectionStore 

func NewSimpleCollectionStore(s Support) CollectionStore

NewSimpleCollectionStore returns a collection stored backed by a ledger supplied by the specified ledgerGetter with an internal name formed as specified by the supplied collectionNamer function

type Filter 

type Filter func(common.SignedData) bool

Filter defines a rule that filters peers according to data signed by them. The Identity in the SignedData is a SerializedIdentity of a peer. The Data is a message the peer signed, and the Signature is the corresponding Signature on that Data. Returns: True, if the policy holds for the given signed data. 

False otherwise

type MembershipProvider 

type MembershipProvider struct {
	IdentityDeserializerFactory func(chainID string) msp.IdentityDeserializer
	// contains filtered or unexported fields
}

MembershipProvider can be used to check whether a peer is eligible to a collection or not

func NewMembershipInfoProvider 

func NewMembershipInfoProvider(selfSignedData common.SignedData, identityDeserializerFunc func(chainID string) msp.IdentityDeserializer) *MembershipProvider

NewMembershipInfoProvider returns MembershipProvider

func (*MembershipProvider) AmMemberOf 

func (m *MembershipProvider) AmMemberOf(channelName string, collectionPolicyConfig *common.CollectionPolicyConfig) (bool, error)

AmMemberOf checks whether the current peer is a member of the given collection config. If getPolicy returns an error, it will drop the error and return false - same as a RejectAll policy.

type NoSuchCollectionError 

type NoSuchCollectionError common.CollectionCriteria

func (NoSuchCollectionError) Error 

func (f NoSuchCollectionError) Error() string

type SimpleCollection 

type SimpleCollection struct {
	// contains filtered or unexported fields
}

SimpleCollection implements a collection with static properties and a public member set

func (*SimpleCollection) AccessFilter 

func (sc *SimpleCollection) AccessFilter() Filter

AccessFilter returns the member filter function that evaluates signed data against the member access policy of this collection

func (*SimpleCollection) CollectionID 

func (sc *SimpleCollection) CollectionID() string

CollectionID returns the collection's ID

func (*SimpleCollection) IsMemberOnlyRead 

func (sc *SimpleCollection) IsMemberOnlyRead() bool

func (*SimpleCollection) MaximumPeerCount 

func (sc *SimpleCollection) MaximumPeerCount() int

func (*SimpleCollection) MemberOrgs 

func (sc *SimpleCollection) MemberOrgs() []string

MemberOrgs returns the MSP IDs that are part of this collection

func (*SimpleCollection) RequiredPeerCount 

func (sc *SimpleCollection) RequiredPeerCount() int

RequiredPeerCount returns the minimum number of peers required to send private data to

func (*SimpleCollection) Setup 

func (sc *SimpleCollection) Setup(collectionConfig *common.StaticCollectionConfig, deserializer msp.IdentityDeserializer) error

Setup configures a simple collection object based on a given StaticCollectionConfig proto that has all the necessary information

type SimpleCollectionPersistenceConfigs 

type SimpleCollectionPersistenceConfigs struct {
	// contains filtered or unexported fields
}

func (*SimpleCollectionPersistenceConfigs) BlockToLive 

func (s *SimpleCollectionPersistenceConfigs) BlockToLive() uint64

BlockToLive return collection's block to live configuration

type State 

type State interface {
	// GetState retrieves the value for the given key in the given namespace
	GetState(namespace string, key string) ([]byte, error)
}

StateGetter retrieves data from the state

type Support 

type Support interface {
	// GetQueryExecutorForLedger returns a query executor for the specified channel
	GetQueryExecutorForLedger(cid string) (ledger.QueryExecutor, error)

	// GetIdentityDeserializer returns an IdentityDeserializer
	// instance for the specified chain
	GetIdentityDeserializer(chainID string) msp.IdentityDeserializer
}

Support is an interface used to inject dependencies

Source Files

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